From 4caf3dff6a9495b597947fc8eb16f00301a182c1 Mon Sep 17 00:00:00 2001
From: Bas Schouten <bschouten@mozilla.com>
Date: Thu, 17 Jan 2019 21:54:00 +0100
Subject: [PATCH] Bug 1520909: Properly support SupportsRegionClipping in
 DrawTargetDual. r=mattwoodrow

Differential Revision: https://phabricator.services.mozilla.com/D16899

--HG--
extra : rebase_source : 03ad075eb41e13b64686dd9939fe5dbcbb6e107e
extra : amend_source : 3ded96951d4ad113cbd55ff96c8cfbf8a4f4273a
---
 gfx/2d/DrawTargetDual.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gfx/2d/DrawTargetDual.h b/gfx/2d/DrawTargetDual.h
index 3972b735a960..0ddf9f5ca7ed 100644
--- a/gfx/2d/DrawTargetDual.h
+++ b/gfx/2d/DrawTargetDual.h
@@ -69,6 +69,10 @@ class DrawTargetDual : public DrawTarget {
     mB->SetTransform(aTransform);
   }
 
+  virtual bool SupportsRegionClipping() const override {
+    return mA->SupportsRegionClipping() && mB->SupportsRegionClipping();
+  }
+
   virtual void DrawSurface(SourceSurface *aSurface, const Rect &aDest,
                            const Rect &aSource,
                            const DrawSurfaceOptions &aSurfOptions,